broke out angular-language-server config to new lsp protocol

lsp/angular-language-server.lua

@@ -0,0 +1,57 @@
+-- Angular requires a node_modules directory to probe for @angular/language-service and typescript
+-- in order to use your projects configured versions.
+
+local root_dir = vim.fn.getcwd()
+local node_modules_dir = vim.fs.find("node_modules", { path = root_dir })[1]
+local project_root = node_modules_dir and vim.fs.dirname(node_modules_dir) or "?"
+local default_probe_dir = project_root and (project_root .. "/node_modules") or ""
+
+local ngserver_exe = vim.fn.exepath("ngserver")
+local ngserver_path = #(ngserver_exe or "") > 0 and vim.fs.dirname(vim.uv.fs_realpath(ngserver_exe)) or "?"
+local extension_path = vim.fs.normalize(vim.fs.joinpath(ngserver_path, "../../../"))
+
+-- angularls will get module by `require.resolve(PROBE_PATH, MODULE_NAME)` of nodejs
+local ts_probe_dirs = vim.iter({ extension_path, default_probe_dir }):join(",")
+local ng_probe_dirs = vim.iter({ extension_path, default_probe_dir })
+	:map(function(p)
+		return vim.fs.joinpath(p, "/@angular/language-server/node_modules")
+	end)
+	:join(",")
+
+local function get_angular_core_version()
+	if not project_root then
+		return ""
+	end
+
+	local package_json = project_root .. "/package.json"
+	if not vim.uv.fs_stat(package_json) then
+		return ""
+	end
+
+	local contents = io.open(package_json):read("*a")
+	local json = vim.json.decode(contents)
+	if not json.dependencies then
+		return ""
+	end
+
+	local angular_core_version = json.dependencies["@angular/core"]
+
+	angular_core_version = angular_core_version and angular_core_version:match("%d+%.%d+%.%d+")
+
+	return angular_core_version
+end
+
+return {
+	cmd = {
+		"ngserver",
+		"--stdio",
+		"--tsProbeLocations",
+		ts_probe_dirs,
+		"--ngProbeLocations",
+		ng_probe_dirs,
+		"--angularCoreVersion",
+		get_angular_core_version(),
+	},
+	filetypes = { "typescript", "html", "typescriptreact", "typescript.tsx", "htmlangular" },
+	root_markers = { "angular.json", "nx.json" },
+}